package com.sky.controller.user;


import com.sky.constant.StatusConstant;
import com.sky.entity.Dish;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController("userDishController")
@RequestMapping("/user/dish")
@Slf4j
//根据分类id查询菜品
public class DishController {

    @Autowired
    private DishService dishService;

    @Autowired
    private RedisTemplate redisTemplate;

    @GetMapping("/list")
    public Result<List<DishVO>> list(Long categoryId){

        //构造redis中的key，规则：dish_分类id
        String key = "dish" + categoryId;
        //查询redis中是否存在菜品数据
        List<DishVO> list = (List<DishVO>)redisTemplate.opsForValue().get(key);
        //如果存在直接返回，无需查询数据库
        if(list != null &&list.size()>0){
            return Result.success(list);
        }
        //如果不存在，查询数据库，并将查询到的结果放入redis中
        Dish dish = new Dish();
        dish.setCategoryId(categoryId);
        dish.setStatus(StatusConstant.ENABLE);
        list = dishService.list(dish);
        redisTemplate.opsForValue().set(key, list);
        return Result.success(list);

    }

}
